I do not own any of china macines and won't... But a co-worker of mine has one of these same knock offs. He didn't know what he was buying when a traveling guy pimped it to him for $50. I have to say it really runs great, it feels as cheap as you would expect a china toy to feal but really runs great. He likes it alot and is now saving to get the real one cause he expects the plastic parts to break sooner or later.
At least one good thing coming from him having one of these things is that he is now sold on the rotary thing and upgrading to the good stuff. He wasn't willing to spend the big bucks till he tried out the cheap model first.